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Now showing items 2321-2330 of 2579
Experimental validation of a numerical model for the ground vibration from trains in tunnels
(
DC/ConfOrg
, 2015 , Conference Paper)
Ground vibration and ground-borne noise from trains in tunnels are attracting increasing attention from researchers and engineers. They are important environmental issues related with the operation of underground networks ...
Modelling the dynamic pile-soil-pile interaction in a multi-layered half-space
(
DC/ConfOrg
, 2015 , Conference Paper)
Within the context of railway ground-borne vibration, the dynamic pile-soil-pile interaction remains an area that has not been sufficiently investigated. Whilst a number of researchers have scrutinised the vibration response ...
Effect of rail unevenness correlation on the prediction of ground-borne vibration from railways
(
DC/ConfOrg
, 2015 , Conference Paper)
This paper presents the influence of rail unevenness correlation on the predicted track and ground vibration. The study is based on an integrated railway model in the wavenumber-frequency domain with varying complexity ...
Pore-scale mechanisms associated with permeability impairment in porous media: A micromodel study
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
Recently, researchers are attracted towards the gas production from hydrate bearing sediments considering its abundance in marine continental margins and persisting demand for alternate energy. Dissociation of hydrate into ...
Impact of fines type on gas flow using 3D micro-computed tomography
(
Society of Petroleum Engineers
, 2019 , Conference Paper)
Methane hydrates are promising unconventional energy source with natural reserves above 1,000 Trillion m3. Hydrates are found in saturated sandy sediments, where multi-phase flow of gas takes place through sediment's pores, ...
Hydrate surface area measurements during dissociation using dynamic 3d synchrotron computed tomography
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
Availability of natural hydrates and ongoing rise in demand for energy, motivated researchers to consider hydrates as a potential energy source. Prior to gas production operations from hydrate-bearing sediments, hydrate ...
Pore networks to characterize formation damage due to fines at varied confinement and sand shape
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
Carbon sequestration in geological formations is in demand for many applications, especially energy production from hydrates. During gas production in a sandy hydrate reservoir, two phase flow and changes in confinement ...
Grouping minimum REV of porosity and tortuosity based on descriptors of sand grains
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
In sandy reservoirs, selecting a representative elementary volume (REV) for the pore scale, is essential for predictive upscaling toward the reservoir scale. The porosity and tortuosity of a sand media are used for REV ...
Deadbeat control with multi-sampling compensation for medium-voltage motor drives by cascaded multi-cell inverter using FPGA based hardware controller
(
IEEE
, 2011 , Conference Paper)
Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a deadbeat control combined with a multi-sampling ...
Identifying the key performance challenges to achieve improved export performance for Qatari SMEs
(
Elsevier
, 2019 , Conference Paper)
Small and medium enterprises in Qatar, similar to their counterparts in other emerging countries, face many challenges by entering international markets. This study aims to identify and analyze the key performance challenges ...